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This commit is contained in:
Behdad Esfahbod 2013-07-23 17:07:06 -04:00
parent 38e852cc2b
commit d8c7e103ec
1 changed files with 14 additions and 9 deletions
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23
pyotlss.py
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@ -374,18 +374,23 @@ def subset_glyphs (self, glyphs):
@add_method(fontTools.ttLib.tables.otTables.ChainContextSubst, fontTools.ttLib.tables.otTables.ChainContextPos)
def subset_glyphs (self, glyphs):
c = self.__classify_context ()
if self.Format == 1:
# XXX De-"Sub" it
indices = self.Coverage.subset_glyphs (glyphs)
self.ChainSubRuleSet = [self.ChainSubRuleSet[i] for i in indices]
self.ChainSubRuleSetCount = len (self.ChainSubRuleSet)
for rs in self.ChainSubRuleSet:
rs.ChainSubRule = [r for r in rs.ChainSubRule
if all (g in glyphs for g in r.Backtrack + r.Input + r.LookAhead)]
rs.ChainSubRuleCount = len (rs.ChainSubRule)
# XXX Needs more work
rss = getattr (self, c.RuleSet)
rss = [rss[i] for i in indices]
for rs in rss:
ss = getattr (rs, c.Rule)
ss = [r for r in ss \
if all (g in glyphs for g in r.Backtrack + r.Input + r.LookAhead)]
setattr (rs, c.Rule, ss)
setattr (rs, c.RuleCount, len (ss))
# XXX Needs more work
# TODO Prune empty subrulesets
return self.ChainSubRuleSetCount
setattr (self, c.RuleSet, rss)
setattr (self, c.RuleSetCount, len (rss))
return bool (rss)
elif self.Format == 2:
# XXX Needs more work
return self.Coverage.subset_glyphs (glyphs) and \